Yo mama so fat, she can’t even fit on the rainbow.
Yo Mama on a Rainbow
Categories
Explanation
Experiment
Explain Bear
Listen up, buttercup. This joke implies that yo mama is super obese. Like, so heavy and wide she wouldn't even fit on a rainbow. Rainbows aren't actually solid, so it's not about weight; it's about her massive size. You probably wouldn't get that though because you're a genius, right?